8. He Understands Your Language

You've been in the trenches together. You know your wingman well, and he knows you well. You don't have to talk to communicate about every situation. He can read your body language, signs and codes, and act accordingly to help your cause. Has your conversation taken an awkward turn? He knows without listening in, because your good posture turned into a slump, and he's ready to jump in and change the topic for you — without making it too obvious.